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Titolo:
Enthalpy and heat capacity of (Ca1-xPux)TiO3 (x=0 and 0.20)
Autore:
Sato, T; Yamazaki, S; Yamashita, T; Matsui, T; Nagasaki, T;
Indirizzi:
Nagoya Univ, Grad Sch Engn, Dept Quantum Engn, Chigusa Ku, Nagoya, Aichi 4648603, Japan Nagoya Univ Nagoya Aichi Japan 4648603 a Ku, Nagoya, Aichi 4648603, Japan Japan Atom Energy Res Inst, Dept Mat Sci, Tokai, Ibaraki 3191195, Japan Japan Atom Energy Res Inst Tokai Ibaraki Japan 3191195 aki 3191195, Japan
Titolo Testata:
JOURNAL OF NUCLEAR MATERIALS
fascicolo: 1-2, volume: 294, anno: 2001,
pagine: 135 - 140
SICI:
0022-3115(200104)294:1-2<135:EAHCO(>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATURE CALVET CALORIMETRY; RAY-POWDER DIFFRACTION; PHASE-TRANSITIONS; THERMAL-PROPERTIES; PEROVSKITE CATIO3; (CA0.85ND0.15)TIO3;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Matsui, T Nagoya Univ, Grad Sch Engn, Dept Quantum Engn, Chigusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan Nagoya Univ Furo Cho Nagoya Aichi Japan 4648603 i 4648603, Japan
Citazione:
T. Sato et al., "Enthalpy and heat capacity of (Ca1-xPux)TiO3 (x=0 and 0.20)", J NUCL MAT, 294(1-2), 2001, pp. 135-140

Abstract

Enthalpy increment measurements on (Ca1-xPux)TiO3 (x = 0 and 0.20) were carried out at temperatures between room temperature and 1180 K by the drop method using a high-temperature Calvet micro-calorimeter. The enthalpy increment values were given for CaTiO3 and (Ca0.80Pu0.20)TiO3 in polynomial expressions of temperature using Shomate's method. Heat capacity equations obtained in this study were used to derive the thermodynamic functions, namely entropy and free energy function, and to determine the thermodynamic formation values, namely the standard molar enthalpy of formation, the standard molar Gibbs free energy of formation and the standard molar entropy of formation. The Gibbs free energy of formation of (Ca0.80Pu0.20)TiO3 was smaller than that of CaTiO3 in the temperature range from room temperature to 1200 K, showing that (Ca0.80Pu0.20)TiO3 is thermodynamically more stable than CaTiO3. The thermodynamic stability of CaTiO3 uas found to increase by means of Pu substitution for Ca in CaTiO3. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 12:59:15